71409 ⎘
Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction; Propellers; Other means for improving propeller efficiency Injection of gas into fluid flow to propellers, or around propeller blades
VENTILATION CONTROL SYSTEM
#2VENTILATION CONTROL SYSTEM
#3VENTILATION CONTROL SYSTEM
#4Hybrid propulsor for watercraft
#5VENTILATION CONTROL SYSTEM
#6Prevention of cavitation
#7VENTILATION CONTROL SYSTEM
#8VENTILATION CONTROL SYSTEM
#9Thruster assembly in a marine vessel
#10Propeller incorporating a secondary propulsion system
#11VENTILATION CONTROL SYSTEM
#12Air lubrication system of ship
#13Ventilation control system
#14Propeller positioning system which constrains the propeller to follow a path generally parallel to the bottom surface of a boat